iOS: Office for iPad® and iPhone® requires iOS 10.0 or later. Office for iPad Pro™ requires iOS 10.0 or later. Office is supported on the two most recent versions of iOS. When a new version of iOS is released, Office’s Operating System requirement becomes the then-current two most recent versions: the new version of iOS and the previous version.

Android: Office for Android™ can be installed on tablets and phones that meet the following criteria: running any of the last 4 major versions of Android and have an ARM-based or Intel x86 processor. Support for KitKat devices will continue until June 2019.